Quantum network nodes with silicon-vacancy center and coupled nuclear spins in diamond nanocavities

ORAL

Abstract

We realize quantum-network nodes based on silicon-vacancy color centers in diamond nanocavities coupled to nearby nuclear spins. A high cooperativity SiV-cavity interface and efficient tapered-fiber collection allows for single-shot readout of the SiV electronic spin. With dynamical decoupling sequences, we measure a coherence time of 400μs. We observe coupling to nearby 13C spins and demonstrate coherent control of the SiV-13C register. By using these nuclear spins, we realize a quantum memory exceeding 1ms. Together with our previous work, these results pave the way for quantum computation based on 2D cluster states with more than 10 photons, and quantum communication based on quantum repeaters.

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Presenters

  • Denis Sukachev

    Harvard University

Authors

  • Denis Sukachev

    Harvard University

  • Mihir K Bhaskar

    Harvard University

  • Christian T Nguyen

    Harvard University

  • Ruffin Evans

    Harvard University

  • Bartholomeus Machielse

    Harvard University

  • Hongkun Park

    Dept. of Chemistry and Chemical Biology and Dept. of Physics, Harvard University, Harvard University, Chemistry and Chemical Biology, Harvard University

  • Marko Loncar

    Harvard University

  • Mikhail Lukin

    Harvard University, Physics, Harvard University